Zobrazeno 1 - 10
of 25
pro vyhledávání: '"J. S. M. Ginges"'
We use the radiative potential method to perform a detailed study of quantum electrodynamics (QED) radiative corrections to electric dipole (E1) transition amplitudes in heavy alkali-metal atoms Rb, Cs, Fr, and alkali-metal-like ions Sr+, Ba+, and Ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1a9343fa46bb2d0a9123ccfe0876126
http://arxiv.org/abs/2212.11490
http://arxiv.org/abs/2212.11490
The finite distribution of the nuclear magnetic moment across the nucleus gives a contribution to the hyperfine structure known as the Bohr-Weisskopf (BW) effect. We have obtained an empirical value of -0.24(18)% for this effect in the ground and exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3a9a8a16fae8674107d381f534e4454
Autor:
Benjamin Roberts, J. S. M. Ginges
We report on our calculations of differential hyperfine anomalies in the nuclear single-particle model for a number of atoms and ions of interest for studies of fundamental symmetries violations. Comparison with available experimental data allows one
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8ca64396fff4c3bcb1c631f756fae04
http://arxiv.org/abs/2101.09924
http://arxiv.org/abs/2101.09924
Autor:
Benjamin Roberts, J. S. M. Ginges
We report a fourfold improvement in the determination of nuclear magnetic moments for neutron-deficient isotopes of francium-207--213, reducing the uncertainties from 2% for most isotopes to 0.5%. These are found by comparing our high-precision calcu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f0c18a28802e1d3527fc60eb86fa5d2
We have performed high-precision calculations of the hyperfine structure for n 2S_1/2 and n 2P_1/2 states of the alkali-metal atoms Rb, Cs, and Fr across principal quantum number n, and studied the trend in the size of the correlations. Our calculati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4e099721cf901c5e81312d99337812a
http://arxiv.org/abs/1907.02657
http://arxiv.org/abs/1907.02657
We study the screening of a homogeneous oscillating external electric field $E_0$ in noble-gas atoms using atomic many-body calculations. At zero frequency of the oscillations ($\omega=0$) the screened field $E(r)$ vanishes at the nucleus, $E(0)=0$.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af46edbb66ae7f7d993c25065cb5d1be
Publikováno v:
Physical Review A. 96
We have systematically investigated the ground-state hyperfine structure for alkali-metal atoms $^{87}\mathrm{Rb},^{133}\mathrm{Cs}$, and $^{211}\mathrm{Fr}$ and alkali-metal-like ions $^{135}\mathrm{Ba}^{+}$ and $^{225}\mathrm{Ra}^{+}$, which are of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10254d5290e89a8752cd5fa7e886874f
https://doi.org/10.1103/physreva.96.062502
https://doi.org/10.1103/physreva.96.062502
Autor:
J. S. M. Ginges, Andrey V. Volotka
Calculations of the magnetic hyperfine structure rely on the input of nuclear properties -- nuclear magnetic moments and nuclear magnetization distributions -- as well as quantum electrodynamic (QED) radiative corrections for high-accuracy evaluation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b11577c095345bc91539e31199d055b4
Autor:
Julian C. Berengut, J. S. M. Ginges
We present a detailed study of the Flambaum-Ginges radiative potential method which enables the accurate inclusion of quantum electrodynamics (QED) radiative corrections in a simple manner in atoms, ions, and molecules over the range 10
12 pages
12 pages
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d957677941485b98eb9a22fb2949c13
Autor:
Julian C. Berengut, J. S. M. Ginges
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 49:095001
We calculate vacuum polarization corrections to the binding energies in neutral alkali atoms Na through to the superheavy element E119. We employ the relativistic Hartree-Fock method to demonstrate the importance of relaxation of the electronic core
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b1d833e511b928e78ad8973c10c87e1
https://doi.org/10.1088/0953-4075/49/9/095001
https://doi.org/10.1088/0953-4075/49/9/095001